78 research outputs found
Color Ferromagnetism of Quark Matter ; a Possible Origin of Strong Magnetic Field in Magnetars
We show a possibility that strong ``magnetic field'' G is
produced by color ferromagnetic quark matter in neutron stars. In the quark
matter a color magnetic field is generated spontaneously owing to Savvidy
mechanism and a gluon condensate arises for the stabilization of the field.
Since the quark matter is electrically charged in the neutron stars, the
rotation of the quarks around the color magnetic field produces the strong
``magnetic field''.Comment: 7 page
Quark Pair Production in Expanding Glasma
Glasma in high energy heavy ion collisions is longitudinal classical color
electric and magnetic fields. The color electric field has been shown to
produces quark and anti-quark pairs by the Schwinger mechanism and to oscillate
with time in non-expanding glasma, that is, plasma oscillation. On the other
hand, in the expanding glasma we show that the field decreases with the plasma
oscillation. We can explicitly obtain the solutions representing such temporal
behaviors in the system with and coordinates. We show these
results by using massless QED as a simplified model of QCD.Comment: 8 pages, 2 figure
Vortex Excitations in Cluster Condensed Nuclei
We point out an intriguing possibility that there exist topological
soliton-like excitations in nuclei with cluster condensation. The
excitations are vortices in superfluid, a property possessed by such Bose
condensed nuclei. We show that the vortex-like states possess quantum numbers
and energies several MeV, measured from the ground
state energies of the condensed states. We point out actual
candidates, for instance, for Be, for
C, etc, although the topological nature as a vortex is obscure in such
light nuclei.Comment: 6 pages, no figure
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